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General Information

Document type
  • Peer-reviewed journal article
GE organism
  • maize
GE trait
  • insect resistance
Country
  • USA

Results

Safety for environment
  • positive effect

Effects of insecticide-treated and Lepidopteran-active Bt transgenic sweet corn on the abundance and diversity of arthropods

Rose, R; Dively, GP
Environmental Entomology. 2007 October. 36(5):1254-68

Link to full text (journal may charge for access)

PMID: 18284751 DOI: http://dx.doi.org/10.1603/0046-225X(2007)36[1254:EOIALB]2.0.CO;2 ISSN: 0046-225X

Abstract

A field study was conducted over 2 yr to determine the effects of transgenic sweet corn containing a gene from the bacterium Bacillus thuringiensis (Bt) on the diversity and abundance of nontarget arthropods. The Bt hybrid (expressing Cry1Ab endotoxin for lepidopteran control) was compared with near-isogenic non-Bt and Bt hybrids treated with a foliar insecticide and with a near-isogenic non-Bt hybrid without insecticides. Plant inspections, sticky cards, and pitfall traps were used to sample a total of 573,672 arthropods, representing 128 taxonomic groups in 95 families and 18 orders. Overall biodiversity and community-level responses were not significantly affected by the transgenic hybrid. The Bt hybrid also had no significant adverse effects on population densities of specific nontarget herbivores, decomposers, and natural enemies enumerated at the family level during the crop cycle. As expected, the insecticide lambda-cyhalothrin had broad negative impacts on the abundance of many nontarget arthropods. One insecticide application in the Bt plots reduced the overall abundance of the natural enemy community by 21-48%. Five applications in the non-Bt plots reduced natural enemy communities by 33-70%. Nontarget communities affected in the insecticide-treated Bt plots exhibited some recovery, but communities exposed to five applications showed no trends toward recovery during the crop cycle. This study clearly showed that the nontarget effects of Bt transgenic sweet corn on natural enemies and other arthropods were minimal and far less than the community-level disruptions caused by lambda-cyhalothrin.

Keywords

Bt sweet corn; nontarget; Cry1Ab; principal response curves; arthropods; field study

Funding

Funding source
  • Maryland Agricultural Experiment Station
  • US Environmental Protection Agency
Funding country
  • United States
Funding type
  • government

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Cite this study

MLA

Rose, R, GP Dively. "Effects of insecticide-treated and Lepidopteran-active Bt transgenic sweet corn on the abundance and diversity of arthropods." Environmental Entomology 36.5 (2007): 1254-68. Web. 13 Dec. 2018.

APA

Rose, R., & Dively, GP. (2007). Effects of insecticide-treated and Lepidopteran-active Bt transgenic sweet corn on the abundance and diversity of arthropods. Environmental Entomology, 36(5), 1254-68. doi:http://dx.doi.org/10.1603/0046-225X(2007)36[1254:EOIALB]2.0.CO;2

Please verify citations before use, citations are automatically generated based on information stored within the GENERA database and therefore may or may not be correct.